Mismatch Negativity (MMN) response studies in elderly subjects.

Unlabelled: Mismatch Negativity is an endogenous potential which reflects the processing of differences incurred in the acoustic stimulus.

Aim: to characterize MMN responses in elderly subjects and compare with adult subjects.

Materials And Methods: prospective study involving 30 subjects, 15 men and 15 women, aged between 60 and 80 years and 11 months.

Microstructures formation in a seemingly ideal homogeneous mixture of ethanol and methanol: An experimental evidence and two-dimensional correlation spectroscopy approach.

An anomalous solution behavior at the molecular scale was observed for macroscopically homogeneous mixtures of methanol and ethanol. Two-dimensional Raman correlation spectroscopy was used to elucidate the possible existence of microstructures formed in the mixture. The result suggests that separate methanol and ethanol clusters are formed without heterohydrogen bonding between different alcohol species.